WARNING in nft_pipapo_destroy

Status: upstream: reported on 2026/08/15 00:10
Reported-by: syzbot+68ef5e861ea09f54325f@syzkaller.appspotmail.com
First crash: 14d, last: 17h21m
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in nft_pipapo_destroy origin:lts-only -1 syz, C 19 1d06h 14d 0/3 upstream: reported C repro on 2026/08/15 00:11
linux-6.6 WARNING in nft_pipapo_destroy -1 23 2d00h 18d 0/2 upstream: reported on 2026/08/10 19:11

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5068 at net/netfilter/nft_set_pipapo.c:2355 nft_pipapo_destroy+0x8b0/0x960 net/netfilter/nft_set_pipapo.c:2355
Modules linked in:
CPU: 1 PID: 5068 Comm: kworker/1:11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events nf_tables_trans_destroy_work
RIP: 0010:nft_pipapo_destroy+0x8b0/0x960 net/netfilter/nft_set_pipapo.c:2355
Code: 24 80 3c 18 00 74 08 4c 89 f7 e8 6b ed 81 f9 49 c7 06 00 00 00 00 48 83 c4 40 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b0 c4 3c f9 <0f> 0b e9 ad f7 ff ff 48 c7 c1 f0 10 8b 8d 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90002f4fa68 EFLAGS: 00010293
RAX: ffffffff883c4af0 RBX: ffff88805fbbe0f0 RCX: ffff88807d45d940
RDX: 0000000000000000 RSI: ffff88805fbbe000 RDI: ffff88801f555828
RBP: ffffc90002f4fc30 R08: ffff88807d45d940 R09: 0000000000000008
R10: 0000000000000018 R11: 0000000000000000 R12: ffff88805fbbe0c0
R13: dffffc0000000000 R14: ffff88805fbbe110 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f06921ef840 CR3: 0000000066639000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nft_set_destroy+0x488/0xa30 net/netfilter/nf_tables_api.c:4972
 nft_commit_release net/netfilter/nf_tables_api.c:8872 [inline]
 nf_tables_trans_destroy_work+0xc5d/0xf00 net/netfilter/nf_tables_api.c:8912
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/28 21:07 linux-5.15.y 28c35638ec51 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 21:06 linux-5.15.y 28c35638ec51 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 21:06 linux-5.15.y 28c35638ec51 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 21:05 linux-5.15.y 28c35638ec51 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 07:24 linux-5.15.y 28c35638ec51 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 07:23 linux-5.15.y 28c35638ec51 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 07:23 linux-5.15.y 28c35638ec51 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/28 07:23 linux-5.15.y 28c35638ec51 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/27 14:02 linux-5.15.y 4a1eaf96ee5c 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/27 10:49 linux-5.15.y 945fa863f02c 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/27 10:48 linux-5.15.y 945fa863f02c 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/26 13:27 linux-5.15.y 945fa863f02c a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/26 13:26 linux-5.15.y 945fa863f02c a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/26 13:26 linux-5.15.y 945fa863f02c a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/26 13:26 linux-5.15.y 945fa863f02c a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/26 00:55 linux-5.15.y 945fa863f02c 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/26 00:55 linux-5.15.y 945fa863f02c 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/24 23:38 linux-5.15.y 945fa863f02c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/24 11:32 linux-5.15.y 945fa863f02c b55bd4c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/24 11:26 linux-5.15.y 945fa863f02c b55bd4c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/24 11:23 linux-5.15.y 945fa863f02c b55bd4c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/23 13:59 linux-5.15.y 945fa863f02c 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/19 16:21 linux-5.15.y 0eb903b5b519 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/19 16:12 linux-5.15.y 0eb903b5b519 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/19 16:10 linux-5.15.y 0eb903b5b519 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/17 23:44 linux-5.15.y aabd761612db 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/17 23:44 linux-5.15.y aabd761612db 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/17 11:14 linux-5.15.y aabd761612db 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/17 11:07 linux-5.15.y aabd761612db 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/15 00:13 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/15 00:13 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/15 00:10 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
2026/08/15 00:10 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in nft_pipapo_destroy
* Struck through repros no longer work on HEAD.